{"id":403167,"date":"2025-01-01T18:53:37","date_gmt":"2025-01-01T18:53:37","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-define-gravity-by-vector-components-and-why-acceleration-vector-is-f\/"},"modified":"2025-01-01T18:53:37","modified_gmt":"2025-01-01T18:53:37","slug":"how-to-define-gravity-by-vector-components-and-why-acceleration-vector-is-f","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-define-gravity-by-vector-components-and-why-acceleration-vector-is-f\/","title":{"rendered":"How to define gravity by vector components and why acceleration vector is -F."},"content":{"rendered":"<p>&lt;p&gt;Hello.&lt;\/p&gt;&lt;p&gt;Here is a simple question. I would like to define gravity by manually entering the vector components, however I cannot find the way to do so. After inseting a &#8220;standard earth gravity&#8221;, Ansys only allows me to set the direction of gravity by selecting one of the global axses:&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/01-01-2025-1735756954-mceclip0.png\" width=\"465\" height=\"366\" \/>&lt;\/p&gt;&lt;p&gt;The components are grayed out, how can I edit the components?&lt;\/p&gt;&lt;p&gt;Also, since I was not able to manually define the direction of gravity, I tried using an acceleration instead. Acceleration does allow to enter components. However it seems acceleration causes the opposite motion in the bodies. For instance when I enter an acceleration pointing to -Y, objects accelerate to +Y instead. Why is this?&nbsp;&lt;\/p&gt;&lt;p&gt;Thanks in advance.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403167","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["403167"],"_bbp_author_ip":["2800:370:127:30a0:7117:534a:fc5b:4d22"],"_bbp_last_reply_id":["403179"],"_bbp_last_active_id":["403179"],"_bbp_last_active_time":["2025-01-02 02:47:09"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["498204","440006"],"_btv_view_count":["244"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["440006"]},"test":"josegegasgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403167\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=403167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}